Due to sulfurization,hydrogen brittleness,and electrochemical corrosion,the casing of large size of old oilfields is worn and hence has a negative effect on the oil well production.
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美
释义
针对老油田大尺寸套管上部因硫化、氢脆以及电化学腐蚀作用而导致破损、影响油井生产的情况;
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